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v3d: Implement the line coord intrinsic

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The line coord intrinsic is loaded from the implicit varying stored in
the same slot as the point coord when drawing lines.

Reviewed-by: Eric Anholt <eric@anholt.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5624>
This commit is contained in:
Neil Roberts 2020-06-22 14:25:08 +02:00 • committed by Marge Bot
parent 14dd65bb5b
commit 2c4616368b
1 changed files with 8 additions and 1 deletions
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9
src/broadcom/compiler/nir_to_vir.c
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@ -2165,6 +2165,10 @@ ntq_emit_intrinsic(struct v3d_compile *c, nir_intrinsic_instr *instr)
vir_uniform(c, QUNIFORM_ALPHA_REF, 0));
break;
case nir_intrinsic_load_line_coord:
ntq_store_dest(c, &instr->dest, 0, vir_MOV(c, c->line_x));
break;
case nir_intrinsic_load_sample_mask_in:
ntq_store_dest(c, &instr->dest, 0, vir_MSF(c));
break;
@ -2720,7 +2724,10 @@ nir_to_vir(struct v3d_compile *c)
c->point_x = emit_fragment_varying(c, NULL, 0, 0);
c->point_y = emit_fragment_varying(c, NULL, 0, 0);
c->uses_implicit_point_line_varyings = true;
} else if (c->fs_key->is_lines && c->devinfo->ver < 40) {
} else if (c->fs_key->is_lines &&
(c->devinfo->ver < 40 ||
(c->s->info.system_values_read &
BITFIELD64_BIT(SYSTEM_VALUE_LINE_COORD)))) {
c->line_x = emit_fragment_varying(c, NULL, 0, 0);
c->uses_implicit_point_line_varyings = true;
}